2013A&A...559A...6L


Query : 2013A&A...559A...6L

2013A&A...559A...6L - Astronomy and Astrophysics, volume 559A, 6-6 (2013/11-1)

Symbiotic stars in X-rays.

LUNA G.J.M., SOKOLOSKI J.L., MUKAI K. and NELSON T.

Abstract (from CDS):

Until recently, symbiotic binary systems in which a white dwarf accretes from a red giant were thought to be mainly a soft X-ray population. Here we describe the detection with the X-ray Telescope (XRT) on the Swift satellite of nine white dwarf symbiotics that were not previously known to be X-ray sources and one that had previously been detected as a supersoft X-ray source. The nine new X-ray detections were the result of a survey of 41 symbiotic stars, and they increase the number of symbiotic stars known to be X-ray sources by approximately 30%. The Swift/XRT telescope detected all of the new X-ray sources at energies greater than 2keV. Their X-ray spectra are consistent with thermal emission and fall naturally into three distinct groups. The first group contains those sources with a single, highly absorbed hard component that we identify as probably coming from an accretion-disk boundary layer. The second group is composed of those sources with a single, soft X-ray spectral component that probably originates in a region where low-velocity shocks produce X-ray emission, i.e., a colliding-wind region. The third group consists of those sources with both hard and soft X-ray spectral components. We also find that unlike in the optical, where rapid, stochastic brightness variations from the accretion disk typically are not seen, detectable UV flickering is a common property of symbiotic stars. Supporting our physical interpretation of the two X-ray spectral components, simultaneous Swift UV photometry shows that symbiotic stars with harder X-ray emission tend to have stronger UV flickering, which is usually associated with accretion through a disk. To place these new observations in the context of previous work on X-ray emission from symbiotic stars, we modified and extended the α/β/γ classification scheme for symbiotic-star X-ray spectra that was introduced by Muerset et al. based upon observations with the ROSAT satellite, to include a new δ classification for sources with hard X-ray emission from the innermost accretion region. Because we have identified the elusive accretion component in the emission from a sample of symbiotic stars, our results have implications for the understanding of wind-fed mass transfer in wide binaries, and the accretion rate in one class of candidate progenitors of type Ia supernovae.

Abstract Copyright:

Journal keyword(s): binaries: symbiotic - accretion, accretion disks - X-rays: binaries

Simbad objects: 79

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Number of rows : 79
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2022
#notes
1 IC 10 G 00 20 23.16 +59 17 34.7   13.6 9.5     ~ 1067 0
2 V* EG And Sy* 00 44 37.1873792808 +40 40 45.704829252 10.54 8.93 7.22     M2.4III 276 0
3 NAME SMC Symbiotic star 3 Sy* 00 48 20.0193584904 -73 31 52.072861548 16.66 16.23 14.74   13.13 M0e 75 0
4 LIN 358 Sy* 00 59 12.2513835168 -75 05 17.615251932   16.82 15.34 14.90 13.77 K/Me 43 0
5 V* AX Per Sy* 01 36 22.7004366768 +54 15 02.411547480   11.45 10.67 11.04   M3IIIep+A0 284 1
6 * omi Cet Mi* 02 19 20.79210 -02 58 39.4956   7.63 6.53 5.03   M5-9IIIe+DA 1490 0
7 EM* StHA 32 Sy* 04 37 45.6311945568 -01 19 11.895512556     13.5     C1,1e_CH5 31 0
8 V* UV Aur C* 05 21 48.9129714624 +32 30 40.177664388   12.46 10.41 9.15   C8,1Je 203 0
9 V* UV Aur B * 05 21 48.9366348480 +32 30 43.562421576           B9V 6 0
10 EM* StHA 55 Mi* 05 46 42.0747792840 +06 43 47.075025792     13.5     ~ 17 0
11 CD-28 3719 Sy* 07 01 09.1555114272 -29 06 25.046471988   12.10 10.59     S6,8e 22 0
12 V* ZZ CMi LP* 07 24 13.9974457224 +08 53 51.786973752   11.10 10.20     M6I-IIep 46 0
13 EM* MWC 560 Sy* 07 25 51.2842107720 -07 44 08.084175396   10.01 9.70 10.60   M4ep+Beq 202 0
14 V* NQ Gem Sy* 07 31 54.5211878712 +24 30 12.562655904   10.19 8.01     C6,2_CH3 93 0
15 V* RX Pup Sy* 08 14 12.3039748200 -41 42 29.080069056   12.39 9.00     M5.5 194 1
16 WRAY 16-51 Em* 09 33 29.5526162856 -46 34 50.943243648   14.98 13.56 13.89 9.57 M4 11 1
17 WRAY 16-62 Sy* 09 54 43.2887829456 -57 18 52.419901680   13.77 12.92 13.01 10.93 M5-7.5 96 0
18 CD-57 3057 Sy* 10 11 02.9432180688 -57 48 13.948381620   11.26 9.99     M4IIIe 63 0
19 WRAY 15-619 Sy* 10 39 08.6786794704 -51 24 12.651866460     12.26     M7 22 0
20 V* SY Mus Sy* 11 32 09.9955543536 -65 25 11.458124364   11.97 10.20     M4 159 0
21 V* VX Crv Mi* 12 21 52.4846132664 -13 53 10.231508904   14.38 12.83 13.82   M9III 19 0
22 V* BI Cru Sy* 12 23 25.9932684936 -62 38 15.988288740 12.06 12.18 11.00 10.71   M2/3 130 0
23 V* V420 Hya Sy* 12 24 32.5099977120 -28 18 55.685798892   11.48 10.24     S4,6e 26 0
24 V* RT Cru Sy* 12 34 53.7361211904 -64 33 56.099018448   12.20 11.35 12.09   M4/5e 83 0
25 V* TX CVn Sy* 12 44 42.0646091112 +36 45 50.621123592   10.96 10.15 9.79   K0III+B8/9_sh 119 1
26 Hen 3-863 Sy* 13 07 43.8887117496 -48 00 19.547431776     12.60     ~ 23 0
27 V* RW Hya Sy* 13 34 18.1289607744 -25 22 48.881433972   11.51 10.00     M1/2IIIe 192 0
28 WRAY 16-141 Sy* 13 54 55.6938014256 -58 27 16.518257496     15.00     K?e 61 1
29 WRAY 16-147 Sy* 14 11 52.0604355768 -51 26 24.187122024     14.20     ~ 228 1
30 WRAY 16-148 Sy* 14 14 09.4115687736 -63 25 46.319333808     14.00     Me 132 1
31 BD-21 3873 Sy* 14 16 34.2914973552 -21 45 50.036218344   12.060 10.684     K2e 74 0
32 V* V748 Cen EB* 14 59 36.6800719896 -33 25 04.056113964   11.86 11.93     Ae 35 0
33 V* T CrB Sy* 15 59 30.1622265912 +25 55 12.613382940   11.516 10.247 9.70   M3IIIe_sh 679 0
34 V* AG Dra Sy* 16 01 41.0120557968 +66 48 10.135056672 11.50 11.06 9.74 8.52   K3IIIep 488 0
35 WRAY 16-208 Sy* 16 14 01.1094201648 -56 59 28.043753388     16.00     M8/9e 84 1
36 NAME UKS-Ce1 Sy* 16 15 29.6278747200 -22 12 15.561486288       15.51 14.19 C4,5Je_CH4 29 0
37 1RXS J161933.6-280736 LXB 16 19 33.3431855736 -28 07 39.901313028   14.523 12.684 12.277 10.072 M2III 42 0
38 V* U Sco CV* 16 22 30.7791646104 -17 52 43.166822628           F8+K2 514 0
39 Haro 1-2 Sy* 16 23 21.6449560512 -27 40 10.321137768   14.42 13.43 13.33   M4e 28 0
40 WRAY 15-1511 Sy* 16 35 15.0820930416 -51 42 27.579159756 14.14 13.92 12.78 11.47 9.80 M2e 31 0
41 [KRL2007b] 194 Psr 16 36 30 -47 37.5           Be 77 0
42 NAME AX J163904-4642 HXB 16 39 06 -46 42.2           BIV-V 87 1
43 V* KX TrA Sy* 16 44 35.4680860800 -62 37 14.058789276   11.91 11.38 12.33   M6 97 1
44 EM* AS 210 Sy* 16 51 20.4046944360 -26 00 26.822670444   11.5 11.9     ~ 71 1
45 V* V934 Her LP* 17 06 34.5128222328 +23 58 18.639373836 11.20 9.16 7.62     M2III 130 0
46 Hen 3-1341 Sy* 17 08 36.5710647672 -17 26 30.408149004           M3.5 58 0
47 IGR J17197-3010 Sy* 17 19 43 -30 10.8           ~ 8 1
48 SWIFT J171951.7-300206 X 17 19 51.70 -30 02 00.6           ~ 3 1
49 [ALS82] C1 Sy* 17 19 57.6571766280 +57 50 05.483985972   18.43 17.15   15.66 C,1e 58 0
50 V* V2116 Oph Sy* 17 32 02.1532435416 -24 44 44.129169096   20.78 18.4     M6IIIe 672 1
51 V* V503 Her Sy* 17 36 40.4576532120 +23 18 11.674690272   13.53 12.57     ~ 16 0
52 V* RS Oph Sy* 17 50 13.1591484960 -06 42 28.480729788   11.884 10.776 11.228   K5.5/M0IIIe 1020 0
53 Hen 3-1591 Sy* 18 07 32.0161894848 -25 53 43.325828808   13.0 12.0     K1III: 39 0
54 EM* AS 289 Sy* 18 12 22.1421252576 -11 40 07.126076028   10.5 12.40     M3 48 0
55 V* Y CrA Sy* 18 14 22.9505428056 -42 50 32.319210732     13.30     M6 43 1
56 EM* AS 297 Sy* 18 14 34.1920736832 +20 59 21.189578820     11.10     M2pev 140 0
57 V* FG Ser Sy* 18 15 07.1022496320 -00 18 52.281676656     11.87     M3e 109 0
58 V* AR Pav EB* 18 20 27.8820649248 -66 04 42.928979808   11.36 7.40     B1 152 0
59 EM* MWC 603 Sy* 18 22 07.8548979216 +23 27 19.934869104   12.34 11.52     M3ep+O 115 0
60 X Sct X-1 HXB 18 35 25.8244223112 -07 36 50.416365528           ~ 74 0
61 EM* AS 327 Sy* 18 53 16.6631365680 -24 22 58.801011132   11.5 13.00     M1-3 47 1
62 V* V850 Aql Mi? 19 23 34.6735036344 +00 37 58.529238492           ~ 27 2
63 V* CH Cyg Sy* 19 24 33.0657463320 +50 14 29.095038672 8.14 8.77 7.08   5.345 M7IIIab+Be 754 0
64 V* HM Sge Sy* 19 41 57.0795884928 +16 44 39.805863828   12.37 10.99 12.217   M7 441 0
65 V* CI Cyg Sy* 19 50 11.8342618008 +35 41 03.004794996   11.97 9.90     M4.9III 414 0
66 4U 1954+31 HXB 19 55 42.3383143920 +32 05 49.046285472   12.02 9.97     M4/5III 114 0
67 EM* AS 373 Sy* 19 57 05.0166505224 +39 49 36.076143036     11.50   10.592 M6/8e 575 0
68 V* RR Tel Sy* 20 04 18.5404499712 -55 43 33.153979080 9.93 11.33 10.81 11.689   M5e 528 0
69 V* PU Vul Sy* 20 21 13.3111130136 +21 34 18.697391652   11.13 10.87 11.697   M3+F2Ib 299 0
70 V* LT Del Sy* 20 35 57.2354539608 +20 11 27.506897808           G6III 99 1
71 V* ER Del Sy* 20 42 46.4988142800 +08 41 13.540747956   12.17 10.39     S5.5 33 0
72 V* V1329 Cyg Sy* 20 51 01.2321742512 +35 34 54.111458316           M4IIIe 297 2
73 CD-43 14304 Sy* 21 00 06.3576663648 -42 38 44.934991116     11.0     K7e 55 0
74 EM* StHA 190 Sy* 21 41 44.8876442736 +02 43 54.414342804   11.13 10.22     G5e 47 0
75 V* AG Peg Sy* 21 51 01.9739297352 +12 37 32.127939336   9.85 8.69     M3IIIe 500 0
76 EM* AS 501 LP* 22 57 40.9715428128 +58 49 12.529058124   10.5 10.9     M2II-III 106 0
77 V* Z And Sy* 23 33 39.9553225728 +48 49 05.974867308 8.86 9.35 8.00     M2III+B1eq 511 0
78 V* R Aqr Sy* 23 43 49.4634303216 -15 17 04.176349872   8.823 7.683 9.37   M6.5-8.5e 768 0
79 Kiso C1-13 C* 23 45 44.6576779680 +62 52 51.107116692     14.8     C6,2 13 0

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2022.09.25-03:08:07

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